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Submission #105148

# Submission time Handle Problem Language Result Execution time Memory
105148 2019-04-10T17:39:05 Z RockyB Snake Escaping (JOI18_snake_escaping) C++17
12 / 100
 2000 ms 66560 KB 
/// In The Name Of God

#include <bits/stdc++.h>

#define f first
#define s second

#define pb push_back
#define pp pop_back
#define mp make_pair

#define sz(x) (int)x.size()
#define sqr(x) ((x) * 1ll * (x))
#define all(x) x.begin(), x.end()

#define rep(i, l, r) for (int i = (l); i < (r); i++)
#define per(i, l, r) for (int i = (l); i >= (r); i--)

#define Kazakhstan ios_base :: sync_with_stdio(0), cin.tie(0), cout.tie(0);

#define nl '\n'
#define ioi exit(0);

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;

const int N = (int)(1 << 20) + 7;
const int inf = (int)1e9 + 7;
const int mod = (int)1e9 + 7;
const ll linf = (ll)1e18 + 7;

const int dx[] = {-1, 0, 1, 0, 1, -1, -1, 1};
const int dy[] = {0, 1, 0, -1, 1, -1, 1, -1};

using namespace std;

int L = 7;


int n, q;
char s[N];
char t[N][20];

int add_id;

int tmr;
int was[20][1594323];
int dp[20][1594323];
ll pw[20];


inline int calc(int v, int mask, int nmask) {
	if (v == n) {
		return s[nmask + add_id] - '0';
	}
	if (was[v][mask] == tmr) return dp[v][mask];
	was[v][mask] = tmr;
	if ((mask / pw[v - L]) % 3 == 2) {
		return dp[v][mask] = calc(v + 1, mask - pw[v - L], nmask + (1 << v)) + calc(v + 1, mask - 2 * pw[v - L], nmask);
	}
	if ((mask / pw[v - L]) % 3 == 1) {
		return dp[v][mask] = calc(v + 1, mask, nmask + (1 << v));
	}
	return dp[v][mask] = calc(v + 1, mask, nmask);
}
/// 3 ^ 0 * q0 + 3 ^ 1 * q1 + 3^2 * q2 = n
/// 7 = 3 ^ 1 * 2 + 3^0 * 1

/*
	3 ^ 2 * q2 + 3 ^ 1 * q1 + 3 ^ 0 * q0
	
*/


int mem[1 << 7][2187];
int hsh[N];
bool good(int mask, int id) {
	if (~mem[mask][hsh[id]]) return mem[mask][hsh[id]];
	rep(i, 0, L) {
		if (t[id][i] != '?') {
			if (t[id][i] == '0' && (mask & (1 << i))) return mem[mask][hsh[id]] = 0;
			if (t[id][i] == '1' && !(mask & (1 << i))) return mem[mask][hsh[id]] = 0;
		}
	}
	return mem[mask][hsh[id]] = 1;
}

int ans[N];
int main() {
	#ifdef IOI2018
		freopen ("in.txt", "r", stdin);
	#endif
	Kazakhstan
	cin >> n >> q >> s;
	rep(i, 0, q) {
		cin >> t[i];
		reverse(t[i], t[i] + n);
	}
	L = min(n, L);
	rep(i, 0, q) {
		rep(j, 0, L) {
			if (t[i][j] == '?') hsh[i] = hsh[i] * 3 + 2;
			else if (t[i][j] == '1') hsh[i] = hsh[i] * 3 + 1;
			else hsh[i] = hsh[i] * 3;
		}
	}
	pw[0] = 1;
	memset(mem, -1, sizeof(mem));
	rep(i, 1, 20) pw[i] = pw[i - 1] * 3;
	rep(mask, 0, (1 << L)) {
		++tmr;
		rep(i, 0, q) {
			if (good(mask, i)) {
				if (n <= L) {
					ans[i] += s[mask] - '0';
				}
				else {
					int st = 0;
					per(j, n - 1, L) {
						if (t[i][j] == '?') st = st * 3 + 2;
						else if (t[i][j] == '1') st = st * 3 + 1;
						else st *= 3;
					}
					add_id = mask;
					ans[i] += calc(L, st, 0);
				}
			}
		}
	}
	rep(i, 0, q) cout << ans[i] << nl;
	ioi
}

Compilation message

snake_escaping.cpp: In function 'bool good(int, int)':
snake_escaping.cpp:82:72: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    if (t[id][i] == '0' && (mask & (1 << i))) return mem[mask][hsh[id]] = 0;
                                                     ~~~~~~~~~~~~~~~~~~~^~~
snake_escaping.cpp:83:73: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    if (t[id][i] == '1' && !(mask & (1 << i))) return mem[mask][hsh[id]] = 0;
                                                      ~~~~~~~~~~~~~~~~~~~^~~
snake_escaping.cpp:86:28: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  return mem[mask][hsh[id]] = 1;
         ~~~~~~~~~~~~~~~~~~~^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1536 KB Output is correct
2 Correct 5 ms 1536 KB Output is correct
3 Correct 6 ms 1536 KB Output is correct
4 Correct 6 ms 1536 KB Output is correct
5 Correct 7 ms 1664 KB Output is correct
6 Correct 7 ms 1536 KB Output is correct
7 Correct 7 ms 1536 KB Output is correct
8 Correct 4 ms 1536 KB Output is correct
9 Correct 4 ms 1536 KB Output is correct
10 Correct 5 ms 1536 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1536 KB Output is correct
2 Correct 5 ms 1536 KB Output is correct
3 Correct 6 ms 1536 KB Output is correct
4 Correct 6 ms 1536 KB Output is correct
5 Correct 7 ms 1664 KB Output is correct
6 Correct 7 ms 1536 KB Output is correct
7 Correct 7 ms 1536 KB Output is correct
8 Correct 4 ms 1536 KB Output is correct
9 Correct 4 ms 1536 KB Output is correct
10 Correct 5 ms 1536 KB Output is correct
11 Correct 1188 ms 33044 KB Output is correct
12 Correct 1471 ms 43352 KB Output is correct
13 Correct 1033 ms 42616 KB Output is correct
14 Correct 1120 ms 42676 KB Output is correct
15 Correct 1630 ms 43588 KB Output is correct
16 Correct 1343 ms 42844 KB Output is correct
17 Correct 1292 ms 42844 KB Output is correct
18 Correct 1347 ms 44636 KB Output is correct
19 Correct 689 ms 41856 KB Output is correct
20 Correct 1444 ms 43444 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1536 KB Output is correct
2 Correct 5 ms 1536 KB Output is correct
3 Correct 6 ms 1536 KB Output is correct
4 Correct 6 ms 1536 KB Output is correct
5 Correct 7 ms 1664 KB Output is correct
6 Correct 7 ms 1536 KB Output is correct
7 Correct 7 ms 1536 KB Output is correct
8 Correct 4 ms 1536 KB Output is correct
9 Correct 4 ms 1536 KB Output is correct
10 Correct 5 ms 1536 KB Output is correct
11 Correct 1188 ms 33044 KB Output is correct
12 Correct 1471 ms 43352 KB Output is correct
13 Correct 1033 ms 42616 KB Output is correct
14 Correct 1120 ms 42676 KB Output is correct
15 Correct 1630 ms 43588 KB Output is correct
16 Correct 1343 ms 42844 KB Output is correct
17 Correct 1292 ms 42844 KB Output is correct
18 Correct 1347 ms 44636 KB Output is correct
19 Correct 689 ms 41856 KB Output is correct
20 Correct 1444 ms 43444 KB Output is correct
21 Correct 1717 ms 46572 KB Output is correct
22 Correct 1661 ms 46840 KB Output is correct
23 Correct 1235 ms 46072 KB Output is correct
24 Correct 1270 ms 45788 KB Output is correct
25 Execution timed out 2001 ms 47720 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #4
0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1536 KB Output is correct
2 Correct 5 ms 1536 KB Output is correct
3 Correct 6 ms 1536 KB Output is correct
4 Correct 6 ms 1536 KB Output is correct
5 Correct 7 ms 1664 KB Output is correct
6 Correct 7 ms 1536 KB Output is correct
7 Correct 7 ms 1536 KB Output is correct
8 Correct 4 ms 1536 KB Output is correct
9 Correct 4 ms 1536 KB Output is correct
10 Correct 5 ms 1536 KB Output is correct
11 Correct 602 ms 18164 KB Output is correct
12 Correct 809 ms 21596 KB Output is correct
13 Runtime error 104 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
14 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1536 KB Output is correct
2 Correct 5 ms 1536 KB Output is correct
3 Correct 6 ms 1536 KB Output is correct
4 Correct 6 ms 1536 KB Output is correct
5 Correct 7 ms 1664 KB Output is correct
6 Correct 7 ms 1536 KB Output is correct
7 Correct 7 ms 1536 KB Output is correct
8 Correct 4 ms 1536 KB Output is correct
9 Correct 4 ms 1536 KB Output is correct
10 Correct 5 ms 1536 KB Output is correct
11 Correct 1188 ms 33044 KB Output is correct
12 Correct 1471 ms 43352 KB Output is correct
13 Correct 1033 ms 42616 KB Output is correct
14 Correct 1120 ms 42676 KB Output is correct
15 Correct 1630 ms 43588 KB Output is correct
16 Correct 1343 ms 42844 KB Output is correct
17 Correct 1292 ms 42844 KB Output is correct
18 Correct 1347 ms 44636 KB Output is correct
19 Correct 689 ms 41856 KB Output is correct
20 Correct 1444 ms 43444 KB Output is correct
21 Correct 1717 ms 46572 KB Output is correct
22 Correct 1661 ms 46840 KB Output is correct
23 Correct 1235 ms 46072 KB Output is correct
24 Correct 1270 ms 45788 KB Output is correct
25 Execution timed out 2001 ms 47720 KB Time limit exceeded
26 Halted 0 ms 0 KB -